CAJ | 학술논문

通过流体力学基本方程组的数值模拟, 初步探讨了矩形腔体内具有Soret效应的混合流体Rayleigh-Benard对流系统中斑图(Pattern)选择的多重稳定性(Multistability)现象.包括有间歇性缺陷的行波和缺陷源水平运动的对传波(Counterpropagating wave)的多重稳定性现象, 不同波数的摆动(Undulation)行波的多重稳定性现象,行波和摆动行波的多重稳定性现象等.对由沿着r增加或r减小方向计算引起的斑图转化过程的滞后(Hysteresis)现象也进行了分析.结果说明混合流体Rayleigh-Benard对流系统中的滞后现象和多重稳定性现象是存在的.
통과류체역학기본방정조적수치모의, 초보탐토료구형강체내구유Soret효응적혼합류체Rayleigh-Benard대류계통중반도(Pattern)선택적다중은정성(Multistability)현상.포괄유간헐성결함적행파화결함원수평운동적대전파(Counterpropagating wave)적다중은정성현상, 불동파수적파동(Undulation)행파적다중은정성현상,행파화파동행파적다중은정성현상등.대유연착r증가혹r감소방향계산인기적반도전화과정적체후(Hysteresis)현상야진행료분석.결과설명혼합류체Rayleigh-Benard대류계통중적체후현상화다중은정성현상시존재적.
By using the numerical simulations of the two-dimensional full equations of hydrodynamics, the phenomena of multistability in pattern selection of the Rayleigh-Benard convection in a binary fluid mixture with Soret effect in a rectangular cell were preliminarily studied. The phenomena include the multistability of the traveling wave with intermittent defects and the counterpropagating wave with a horizontal motion of defects, the multistability of the undulation traveling wave with different wavenumbers, and the multistability of the traveling wave and the undulation traveling wave. The hysteretic phenomena in the pattern transition caused by simulations along different direction of increasing r or decreasing r were also analyzed. The results showed that the phenomena of multistability and hysteresis existed in Rayleigh-Benard convection in a binary fluid mixture.